Auto sled attachment



J. T. DUNNIGAN AUTO SLED ATTACHMENT Filed Nov. 12 1928 June 9, 1931.

INV EN TOR.

I l fl" T 0 NEY Patented June 9, 1931 UNITED STATES 1 "onion JOSEPH THOMAS nunmemtor nnmnoln; meme AUTO SLED ATTACHMENT Application filed November 12, 1928, seriai qo. a1s;,s1s, a a inlcanada narch 2a, 1928.

This invention relates to auto sled attach wheels which will afford double traction on the road bed, to overcome the diggingv in of more specifically set forth, claimed and shown in the accompanying drawings form'- ing a part of the present application.

Fig. 1 illustrates a perspective side view of the preferred embodiment of my'inven-,v

tion.

U-shaped cross brace. with its associate parts as attached to the runners.

' Likenumerals of'reference designate cora wheel 14 in unison with the wheel 7. i

responding parts.

1 indicates the runners, which are shown in the present application as of ordinary. conventional type. 'I' have not shown spacing members to brace the front and rear ends of these runners in parallelrelationship to" each other, as braces of any desired type convenient for the particular purpose may 5 be used if so desired and found necessary.

2 indicates a standard secured at its lower end to the runner 1, the upper end of which is bifurcated to pivotallyisupport the forward end of the connecting barf3. Each runner is provided with one of these standards and a connecting bar. -Adjacent the forward end of the connecting bar 3, I provide asplit bearing 4:, adapted to be clamped over a suitable bearing'block 5 mounted on the axle housing 6 near the inner face of each of the ordinary traction wheels 7. This I will permit of oscillation of the bearing 4: on the bearingblock 5. Rearwardly of the axle housing 6,1". provide an inverted U- shaped cross brace 8, having its ends conthe single pair of traction wheels and at Fig. 2 is a transverse sectional view of the nected to the runners 1. Each end of this bracef is provided with a guide member 9, extending upwardly in parallel alignment with its respective end portion of the'brace =8 and'extending upwardly above the main or cross portion thereof. .Each guide membe'r 9 has a longitudinal slot as at 10 through 1 which its respective connecting bar 3 is ex tended and is free tomoveup or down. At' 1* the same time the guide member 9 prevents 1 twisting 'of the' connecting bar. a, IJThe rear end of each connecting bar 3'is preferably offset in an upward direction as at ll and is-provided with an outwardly directedstub shaft 12,0n which an auxiliary wheel'l is mountedf 15 indicates a traction tread-chain ofany-suitable design, which, maybe used in connection -withthe construe tion shown in fthis disclosure. :It is prefer ably provided with side members and cross 'connecting members such as arecomm o'nly used on pneumatictir'es to provideitraction, the only 'difieren'ce being that the chainis around the "sets of wheels 7 and 14: and thus provides a means for driving the auxiliary From the construction hereinbe'foredescribed, taken in 'Combinationwith the'annexed drawings, it willbe appreciated that a I provide an auto sled as an auxiliary attachment for motor vehicles which can be easily and quickly attached when required. The rear axle housing maybe raised and the forward-ends of the runners 1 extendedunder the housing until the bearing 4 is die -much longer-so as toextend in beltwise form I rectly under the bearing block 5, which has been properly positioned on the axle housing after which, the vehicle with its auxiliary sled attachment, is ready for use 1 When the auxiliary attachmentis in 'posi-w c the standards 2 on the runners 1, while the" Thetop part of the bearing is then cl'ampedover the bearing block; 5; The chains 15 arethenplaced in position over 1 vtheir respective sets of wheels 7 an d 14,

rear end is supported from its respective auxiliary wheel 14. On level road beds both wheels 7 and 14 will contact therewith with equal traction, but if the surface of the road bed has any depth of loose snow, the runners will carr most of the weight of the vehicle and the traction wheels 7. withtheir auxiliary wheels 14 co-acting together and will 7 sink into the snow to a sufficient depth to afford proper traction contact therewith by means of the chains 15. In my construction, the Wheels 7 and the auxiliary wheels l4 are mounted in such a manner as to permitinde pendent movement on the respectiveside of the vehicle according to the unevenness of" the road bed.

The foregoing specification and annexe drawings disclose the preferred embodiment of my invention, butit isto be understood that minor changes may be resorted to in the commercial adaptation of" my invention Without departing from the scope of the invention ashereinafter claimed.

What I claim as new is:

An auto sledfor vehicles provided with a pair of runners; a suitable brace'connecting said runners; each end of said brace being I, provided wlth a guide plateyvertmal standards supported from said runnersyconnecting bars, having their forward ends pivotally connected to the upper ends of said I standards; means for connecting the axle housing of a vehicle adjacent" the forward ends of said connecting bars; the upward movement of said connecting bars being limited by said guide plates; auxiliary tracting Wheels mounted from the rear'end ofisaid connecting bars and a traction tread chain extending beltwise, around each respective auxiliary wheel and its co-acting traction wheel.

In testimony whereof, affix signature. 1

. JOSEPH THOMAS DUNNIGAN. 

